Process of producing phenylglycin and its homologues.



UNITED s'rA'rEs PATENT osnion ROBERT SOHIviIDLIN, OFiHGC'HST-QN -THE-MAIN GERMANnAssIeNoR- T FARBWERKE voRM. MEISTER, LUC-IUS a; BRUNING, 0F HOCHST-ON-THE-MAIN, GERMANY, A CORPO- RATIO or GERMANY.

vnnoonss or rnonnome' PnnnYLGLYoIN AND r'rsnomonoenns:

no. 868,294. v

Si ecifleation of Letters Patent.

Patented Oct. 15; 1907.

Application ma lay as, me. Serial No. 318.297.

Toallwhom'itmaycwrice1'1 ai Be it known that I, RonnM'Sonmnnm chemist, a citizen of the Swiss Repubiiiiresiding atfifichst-pnthe-Main, .Gerrriany', haweinvented certain new and useful Irnproyenient in the? Process "is: Producing Phenylglycin 21nd its Iion olegues; of which the following is a specification. H 7

By the usual process for obtaining phsnylglycin by the action of chloracetic-acid on an excess of 10 or of aniliniri presence of agents capable-oi I l with hydrochloric acid, like alkalies-or acetates, poor yields are obtained owingrto formation of by-products from the action of chloraceticacid. on the phenylglycin produced.

According to the present invention: good yields may be obtained, if care be taken that when the glycin or its homologues be formed his separated as an insoluble salt of a heavy metal so that'it isno longer liable to the further action of the chloracetie acid. I The process may becarried out, iorinstance, as followsz Chloracetic acid is allowed to act on anilin in presence of ferrous hydrateior in presence of ferrous carbonate, and a concentrated'salt solution; the phenylglycin iron salt thus formed is insoluble in a hot concentrated salt solution and may be filtered and decomposed by caustic alkali or alkali carbonate.

.The following example illustrates the invention, but it is capable ofvariatioii both as regards the proportions and the details thereof: 1250 kilos of ferrous-chlorid are dissolved in water and precipitated with the requisite I quantity of soda lye or sodium carbonate, whereupon preferably 300 kilos of common salt are added and the mixture heated to from'QO-IOO" (1., 472 kilos of chloracetic acid being then added and the whole is stirred I 7 once and 510 kilos of anilin are rapidly introduced, whereupon the whole is heated under a reflux condenserforone hour ands half. When cold, the phenylglycin iron salt thus obtained is filtered,'wasl1ed with some cold water, stirred with water and decomposed *fivith soda lye or sodium carbonate." The mass is made to boil by steam and the unchanged anilin-is distilled or filtered off. {lhe'fezrous pxid or ferrous carbonate is separated by filtration-and the phenylglycin is precipitated from the filtrate carefully adding dilute mineral acidp IIl aJlk' inanner homologues of phony glycin, such as to lylgl'ycin, are obtained, if for the anilin in the example be substituted the equivalent quantity of the homologue; such as it toluidin.

Having described iny invention, what I claim is:-

The herein described process of making phenyiglycin .nnd its homologues, which consists in cousing'primztry aniiin buses to interact in the heat with cliioracctic acid.

in presence of ferrous hydrate alkali salt solution. V

In testimony, that I claim the ijoregoing-as my invention, I have signed my name in presence of two subscribing witnesses. v

and a saturated indifferent ROBERT SCHMIDLIN.

Witnessesi I 'JnAN .GBUND, CARL -GRUND. 

